How to Calculate Cat Pregnancy
What is Cat Pregnancy?
Feline gestation averages 63–65 days (~9 weeks). A pregnancy calculator estimates birth date from mating date and tracks development milestones.
Formula
Gestation period: 58–67 days (average 63). Litter size: 2–12 kittens (average 4–5). Birth weight: 80–150 grams per kitten
- ConceptionDate
- Estimated conception date (Date)
- GestationDays
- Days of pregnancy (Integer (58–67))
- ExpectedDueDate
- Expected birth date (Date)
Step-by-Step Guide
- 1Due date = Mating date + 65 days
- 2Week 3: nipple pinking; morning sickness possible
- 3Average litter: 3–5 kittens
- 4Vet care recommended throughout pregnancy
Worked Examples
Input
Mating: 1 February
Result
Expected birth: ~8 April
Frequently Asked Questions
How do I know if my cat is pregnant?
Heat cycles stop. Nipples enlarge/redden (week 3–4). Abdomen enlarges (week 4+). Nesting behavior (week 8). Ultrasound confirms by day 11 post-conception.
What prenatal care does pregnant cat need?
Veterinary exam, good nutrition (extra protein/calories), relaxed environment, warm nesting box. Monitor for complications: no food > 12 hrs before due date = emergency.
When should I be concerned?
Prolonged labor (> 2–4 hrs between kittens), straining without birth, green discharge = emergency. Post-birth: retained placenta, lack of milk, rejected kittens. Call vet.
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